<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <script src="../js/jquery.min.js"></script>
    <script>
        $(function () {
            $("#btn").click(function () {
                $.ajax({
                    url: 'http://localhost:8080/back_page_war_exploded/back/anno',
                    dataType: "json",  //数据格式设置为jsonp
                    success: function (data) {  //成功的回调函数
                        console.log(data)
                        alert(data)
                    }
                })
            })
        })
    </script>
</head>
<body>
<button id="btn">点我试试</button>

<span>未改变</span>
</body>
</html>